Frank r



`(NoMoael.)

F. R. BISCHOFF.

- MAGAZINE TACK HAMMER.

No. 529,237. v 'Patented Nov. 13, 1894.

I UNITED STATES PATENT OFFICE.

FRANK R. BISCHOFF, OF MORRS, INDIANA, ASSIGNOR TO SCOTT C. BONE AND.'TOHN-D. OCONNOR, OF SAME PLACE.

MAGAZINE TACK-HAM MER.

SPECIFICATION forming part of Letters Patent-No. 529,237, dated November13,1 894.

l Application filed February 15, 1894. Serial No. 500,258. (No model.)

To all whom it may concern:

Be it known that I, FRANK R. BISOHOFF, a citizen of the United States,residing at Morris, in the county of Ripley and State of Indiana, haveinvented certain new and useful Improvements in Magazine Tack-Hammers;and I do hereby declare the following to be a full, clear, and exactdescription of the in ven' tion, such as will enable others skilled inthe art to which it appertains to make and use the same;

My invention relates to magazine tack-hammers.

'lne object of the invention is to provide a simple, strong andeflicient hammer of this class which will be cheap and durable, and notliable to get out of order.

For a detailed description, reference is made to the followingspecification and to the accompanying drawings, in which- Figure l is aside-view of the hammer. Fig.

2 isa sectional view on the line 2--2 of Fig. 3. Fig. 3 is a sectionalview on the line 3-3 of Fig. 2. Fig. 4 is a sectional view on the `line4-4 of Fig. 2, and Fig. 5 is a bottom plan viewof a portion of thehammer.

Referring to the drawings, 1 indicates the handle, which is of ordinaryconstruction.

2 indicates a tack magazine to which the handle is attached, and 3indicates a head upon the outer end of the handle or magazine which ishollow and preferably cylindrical and in which the hammer proper, ordriving plu-nger, 4, works.

The tacks are introduced into the magazine 2 through an opening 3?,which is usually closed by a suitable cover 4a. In the lower side of themagazine is a longitudinal slot 5, which is Wide enough to permit thestems of the tacks to pass through, but not sufficiently wide to allowthe head to pass. Above the channel or slot 5 isa guard `or false bottom6 which ext-ends from the head 3 for a consid-- era'ble distance inwardover the slot 5, thus preventing the main body of tacks in the magazinefrom interfering with the movement of the tacks in the guide slot.

During the operation of hammering, the jarring of the hammer will shakethe tacks and cause them to gradually pass over the inner end 7 oftheguard, after which the continued jarring of the hammer will cause themto adjust themselves properly in the. guide slot.

The driving plunger 4, as shown, is cylin drical and provided with ahead 8. The mo- Vtion of the plunger in the hollow head 3 is limited bya pin 9, the ends of which tit in grooves l0 within the head,`thuspreventing the plunger from turning, and also limiting its longitudinalmovement. The plunger is normally held at. its highest position by meansof a suitable spring ll which may be coiled around the plunger andinterposed between the head 8 and the cylindrical head 3. The tackchannel extends through an opening 12 in the lower part of the head 3 soas to'carry the tacks to the interior of said head. Within the head apair of movable pawls 13 are pivoted,as shown best in Fig. 3. Thelower-edges of the pawls are separated normally at the side adjacent tothe tack channel and they are in line with and form a continuation ofsaid channel 5. These pawls are provided with shoulders 14 near themiddle which are normally in contact and limit the movements of thetacks so that but one tack may enter the head at a time. The pawls 13are pivoted to the cylindrical head by pivots 15,and they are providedWithupper arms 16 which normally rest between the lower end ot' theplunger-and the wall of the cylindrical head, thus holding the pawls inposition to receive and 'retain the tacks. When, however, the plunger islowered, its lower end strikes the pawls 13 and forces them apart, theupper arms 16 being simultaneously moved toward each other and intoopenings 17 in the plunger.

The operation ot' my improved hammer is as follows: A number oftacks,-the contents of a small paper, for instance,-may be placed siredto drive the tack, the inertia of the driv-/ioo ing plunger 4 will carryits lower end down to the bottom of the hollow head and/in its progressit will separate the pawls, release the tack, and drive it. Im mediatelyafter the tack is driven, the plunger 4 will rise and the operation ofswinging the hammer will throw a new tack in between the pawls ready tobe driven.

In the foregoing speeilication I have described the preferred form of myinvention. It will be evident that minor changes in construction may bemade without departing from the spirit thereof.

Therefore, without limiting myself to the precise form and arrangementof parts shown and described, I claim- 1. In a magazine tack hammer thecombination with the hollow head, the handle and the tack magazineconnected together, of a driving plunger adapted to reciprocaterelatively to the head and operating by its inertia to drive the tacks,and a guide-way for conducting tacks from the magazine to the lower endofthe plunger, substantially as described.

2. In a magazine tack hammer the combination with the hollow head and ahandle, ol a driving plunger adapted to reciprocate in the head andoperating by its inertia, a tack magazine connected to said head andhaving a tack channel or guide slot leading to the lower part thereof,and pawls for receiving and holding the tacks beneath the plunger,substantially as described.

3. In a magazine tack hammer the combination with the handle and thetack magazine having a guide or slot therein, of a hollow head to whichthe magazine is attached, a driving plunger adapted to reciprocate insaid head and operating by its inertia, said plunger being provided withrecesses near its lower end and a retracting spring, a pair of pawlspivoted in the sides of the head, the lower edges of said pawls beingopposite to and forming a continuation of the tack channel of themagazine, and the upper ends of said pawls being normally separated bythe lower end of the plunger and adapted to pass into the recesses ofthe plunger when the latter is lowered, substantially as described.

4. In a magazine tack hammer the combination with the hollow head, thedriving plunger and the tack magazine having a guide slot in its lowerside leading to the said head, of a pair of pawls pivotedin the insideof tile head beneath the driving plunger, said pawls having olset edgesnormally separated at one end and in line with the guide slot, theolsets or shoulders being normally in contact and forming astop for thetacks whereby the tacks may be guided to and centered under the plunger,substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

FRANK R. BISCHOFF.

Witnesses:

JN0. D. OCoNNon, Scorr C. BONE.

Correction in Letters Patent No. 529,237.

It is hereby certified that the residence of the assignees in LettersPatent No. 529,237, granted November 13, 1894, upon the application ofFrank R. Bischoff, of Morris, Indiana, for an improvement in MagazineTack-Hammers, was erroneously Written and. printed of same place;7 (i.e., Morris, Indiana), Whereas said residence should have been Writtenand printed Washington, District of Columbia; and that the said LettersPatent should be read with this correction therein that the same mayconform to the record'of the case in the Patent Office.

Signed, countersigned, and sealed this 20th day of November, A. D.1894.

JNO. M. REYNOLDS, Assistant Secretary of the Interior.

[SEAL] Countersigned S. T. FISHER,

Acting Commissioner of Patents.

